From eebe132aed0170accf7feb7618bc8beeceb57e5c Mon Sep 17 00:00:00 2001
From: Steve Clay <steve@mrclay.org>
Date: Sat, 30 Aug 2008 07:25:37 +0000
Subject: [PATCH] Added CSS/UriRewriter.php : untested!
 Minify/ImportProcessor.php units need fixing

---
 min/lib/Minify/CSS/UriRewriter.php            | 102 ++++++++++++++++++
 .../_test_files/importProcessor/1/bad.css     |   1 -
 .../test_Minify_ImportProcessor.php           |   4 +-
 3 files changed, 103 insertions(+), 4 deletions(-)
 create mode 100644 min/lib/Minify/CSS/UriRewriter.php
 delete mode 100644 min_extras/unit_tests/_test_files/importProcessor/1/bad.css

diff --git a/min/lib/Minify/CSS/UriRewriter.php b/min/lib/Minify/CSS/UriRewriter.php
new file mode 100644
index 0000000..4434c0d
--- /dev/null
+++ b/min/lib/Minify/CSS/UriRewriter.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Class Minify_CSS_UriRewriter  
+ * @package Minify
+ */
+
+/**
+ * Rewrite file-relative URIs as root-relative in CSS files
+ *
+ * @todo: unit tests, use in Minify_CSS and Minify_ImportProcessor
+ * 
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ */
+class Minify_CSS_UriRewriter {
+    
+    /**
+     * Rewrite file relative URIs as root relative in CSS files
+     * 
+     * @param string $css
+     * 
+     * @param string $currentDir The directory of the current CSS file.
+     *
+     * @param string $docRoot The document root of the web site in which 
+     * the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']).
+     * 
+     * @return string
+     */
+    public static function rewrite($css, $currentDir, $docRoot = null) 
+    {
+        self::$_docRoot = $docRoot
+            ? $docRoot
+            : $_SERVER['DOCUMENT_ROOT'];
+        self::$_docRoot = realpath(self::$_docRoot);
+        self::$_currentDir = realpath($currentDir);
+        
+        // remove ws around urls
+        $css = preg_replace('/
+                url\\(      # url(
+                \\s*
+                ([^\\)]+?)  # 1 = URI (really just a bunch of non right parenthesis)
+                \\s*
+                \\)         # )
+            /x', 'url($1)', $css);
+        
+        // rewrite
+        $css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/'
+            ,array('Minify_CSS_UriRewriter', '_uriCB'), $css);
+        $css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/'
+            ,array('Minify_CSS_UriRewriter', '_uriCB'), $css);
+
+        return $css;
+    }
+    
+    /**
+     * @var string directory of this stylesheet
+     */
+    protected static $_currentDir = '';
+    
+    /**
+     * @var string DOC_ROOT
+     */
+    protected static $_docRoot = '';
+    
+    protected static function _uriCB($m)
+    {
+        $isImport = ($m[0][0] === '@');
+        if ($isImport) {
+            $quoteChar = $m[1];
+            $uri = $m[2];
+        } else {
+            // is url()
+            // $m[1] is either quoted or not
+            $quoteChar = ($m[1][0] === "'" || $m[1][0] === '"')
+                ? $m[1][0]
+                : '';
+            $uri = ($quoteChar === '')
+                ? $m[1]
+                : substr($m[1], 1, strlen($m[1]) - 2);
+        }
+        if ('/' !== $uri[0]) {
+            if (strpos($uri, '//') > 0) {
+                // probably starts with protocol, do not alter
+            } else {
+                // it's a file relative URI!
+                // prepend path with current dir separator (OS-independent)
+                $path =  strtr(self::$_currentDir, '/', DIRECTORY_SEPARATOR)  
+                    . DIRECTORY_SEPARATOR . strtr($uri, '/', DIRECTORY_SEPARATOR);
+                // strip doc root
+                $path = substr($path, strlen(self::$_docRoot));
+                // fix to root-relative URI
+                $uri = strtr($path, DIRECTORY_SEPARATOR, '/');
+                $uri = str_replace('/./', '/', $uri);
+            }
+        }
+        if ($isImport) {
+            return "@import {$quoteChar}{$uri}{$quoteChar}";
+        } else {
+            return "url({$quoteChar}{$uri}{$quoteChar})";
+        }
+    }
+}
diff --git a/min_extras/unit_tests/_test_files/importProcessor/1/bad.css b/min_extras/unit_tests/_test_files/importProcessor/1/bad.css
deleted file mode 100644
index bd3704b..0000000
--- a/min_extras/unit_tests/_test_files/importProcessor/1/bad.css
+++ /dev/null
@@ -1 +0,0 @@
-/* I should not be imported */
\ No newline at end of file
diff --git a/min_extras/unit_tests/test_Minify_ImportProcessor.php b/min_extras/unit_tests/test_Minify_ImportProcessor.php
index 0823b2b..52b19ff 100644
--- a/min_extras/unit_tests/test_Minify_ImportProcessor.php
+++ b/min_extras/unit_tests/test_Minify_ImportProcessor.php
@@ -1,7 +1,5 @@
 <?php
 
-return; // refactoring
-
 require_once '_inc.php';
 
 require_once 'Minify/ImportProcessor.php';
@@ -10,7 +8,7 @@ function test_Minify_ImportProcessor()
 {
     global $thisDir;
     
-    $linDir = $thisDir . '/_test_files/cssLinearizer';
+    $linDir = $thisDir . '/_test_files/importProcessor';
     
     $testFilesUri = substr(
         realpath($thisDir . '/_test_files')